The PaveDrain permeable paving system reduces the amount of impervious area while also serving as stormwater pretreatment. The stormwater passes through the pavers and enters the underground stormwater detention system: R-Tanks. At 95% void space, R-Tanks are the most efficient storage option available. FocalPoint biofiltration systems provide the ultimate water quality with minimal footprint. Both FocalPoint systems fit within one parking lot island. Each FocalPoint is protected by a Rain Guardian Bunker: a curbside pretreatment device that is simple to install, easy to maintain and extends the effective life of bioretention cells and rain gardens.